Apparatus for rifling pipes or tubes.



PATENTED MAY 26, 1908 a SHBETS-SHBET 1.

' 0. FELL. v

APPARATUS FOR RIF'LING PIPES 0R TUBES. APPLICATION FILED 0OT.4,1907.

V cm? V "M W j w flw\ g 0 0 W, 0 mjw A 2 M a- I 'P ATBNTED MAY 26, 1908. 0. FELL. I APPARATUSYPOR RIPLING PIPES ORTUBES.

AIPPLIGATIONIFILED 0014,1907.

WITNESSES INVENTOF? ivo. 888,984. P PATENTED MAY 26, 1908. v

0. FELL.

APPARATUS FOR RIPLING PIPES OR TUBES.

' APPLICATION I'ILED 0014,1907.

3 SHEETS-SHEET 3.

W In

\ sla f WITNESSES 3 J4 IN'VENTOR il iti lli ltlilt "rt rw Ail?! S YLVANIA, A CORPORATIONOF NEW JERSEY.

APPARATUS F015 RXELING- PllES OR TUBES. l

Application filed. October i, 1907. Serial No. 395,913

Specification of Letters Patent.

Patented May 26. 1908.

wwnm...

, clear, and exact lcsz-ription, reference being had to the accompanying drawings, .lorming part of this speri'limtion, in which- Figure l is a top plan view of one form of apparatus mnhorlying my invention; Fig. a side View ol a portionol a pipeor tube showing [the Work done h the apparatus, F 3 is a perspectire "view showing the riliing rolls removed from the machine, but in Working relation to each other; Fig. 4 is a plan View ot the some; Fig. 5 is an end View of one of the roll housings; anil Fig. i; is section on the line VL VI of Fig. In Figs. and ('3 the rolls are she '11 as in parallel post tion. I i

The invention has relation to means for forming grooves or rill s in pipes or tubes, and is designed to provide apparatus Whereby this Work can be rapidly and-eli'ectivciy carried out by means of rolls, between VS'lllCi the pipes or tubes are fed.

The precise nature of my invention Will be best understood by mferenrc to the accompanying drawings, which will now he (le- S('-Ill)(.l, it being premised, however, that ii rious changes may he made in the construction and arrangement of the parts by those skilled in the art without iicparting groin my invention as (tr-finial by the appe ded claims.

in these drawings, thev runnerztls 2 and 3 designate the rilling rolls carried hy the respective sh: -1- anil 5. Each of these rolls is formed with a groove or pass 4%, whit-h of semi-elliptioal Form, and whose forming; Wall is 'ornicrl with a centrally located circumferenlial rim. 7, and with the lateral (ircunil'vrontially extending rihs The shape of the groove or pass and ol the ribs is the same in both rolls.

'lhe'pipe or tube to be rifled fed longitw dinally between these rolls, the rilles being formorlhy the ribs 7 and 8. 'lhepitch of the Titling formed in thehtuhe will, of course, le-

. pend upon the angular position of the rolls with respect to each other; and when a spiral ril'iing is'to he formed, the two rolls are placed, as shovi'n in. Figslh' and i, so that their longitudinal axes cross h other in vertical plane, Whieh passes through the centor of the roll grooves. While these grooves or passes are of semi-elliptical form, as described, in order to clear the pipe or tube which is fed therethrough ina lme perpendicular to a line which bisects the an 185 formed by, the roll axes, it will be seen t at it a (I'OSS-SQCtlOIl be taken through the rolls on the last-named line, designated a-'a in l rjlm, L; ;j=' L-L ml 1N, OHIO, ASSIGNOR TO NAlIC-YAL TUBE COMPANY, OF PITTSBURG,

Fig; 4, said section will show a circular openthrough which the pipe or tube passes as seen in Fig. 3. The pipe or tube, refer'alaly while heated, is passed between tiese. rolls,

which arerevolvecl in the some direction, as

indicaterlby the arrows in Fig. 3, and is" thereby rotated about its longitudinal axis, the ribs 7 and S forming therein the grooves or rilling inilicated'at ac, in Fig. 2; The semielliptical or flaring form of the grooves causes them to hug the outside diameter of the pipe (hi-ring the operation of riflin thus preventing the pi )e from becoming attened or distorted. 'lihe three ribs or beads on each roll divide the circle of the cross-section of the pipe into six equal divisions, as clearly shown in Fi 3.

in order that all the grooves or rifles may he of a uniform depth, it is necessary to make the outside heads 8 of greater height or pro jection than the center heads 7, since thellattor grip tho pipe on a true diameter and indent it for their full depth, while the outside howls grip the pipe at the angle to which the are set; orin other Words, the outside hoods grip in outside diameterof the 0112111 ellipse. and do not imlunt the pipe iur thvir lull depth.

it is, of course, nerrssary to provide a ilil l'errnt set of rolls for each ilill'oront diameter of pipe, will it is alsoneressary to provide a special Svl', of rolls tor each material change in the pitch of the rilling; desired, it'hcing also iwrvssacr to changitiai angle of intersection of the roll axes for each change in pitch. To permit this, the roll l'ts i and 6 are journalml in boxes 10, which are carried in the arms of U-shaped yokes l], which are swivol" the roll-supporting frames or housings. The VGEtlOZI-l axes of the bosses [4; on the yokes l '1; which bosses form theswivels or pivots or the rolls, coincide with the point of intersect-ion of crossing of the roll axes. The adjustment of the yohes 11 to secure the rolls in the proper angular relation, may be elril in the top and hottozn plates .12 and 13 I have shown arrelectric motor ,cti'ected by means of the bolts 15, which eX- tend through the curved. slots 16in the top andbottom housing plates.

The couplers or wabblers which connect the rolls with their driving gears permit the necessary movement of the rolls for the pur-' use of making this adjustment, these c0up' rolls. 18 is a bell-shaped guide, throu h which the pipes or tubes pass to the rolls.

The rollers 17 may be driven by any suitable gearing, such as indicated at 19 in Fig. .1.

Both rolls are positively driven by any suitable arrangement of gearing. In Fig. '1 20, whose shaft 21 carries two bevel pinions 22 and The bevel pinion 22 meshes with a similar pinion 23 on shaftv 24 parallel with the shaft 4, and cared thereto bya spur pinion 25 an spur w eel 26. The bevel pinion 23drivcs a bevel pinion 27 one shaft 28 which is parallel to the roller shaft 5, and is geared thereto by the spur pinion 29 and spur wheel 30. i

The advantages of my invention result from the provision of the grooyed r'olls having circumferentially arranged ritling beads or ribs adapted to engage the pipes or tubes and form rilles therein in the manner described. By the use of these rolls, the work of riding may be rapidly and ellieiently performed, and by the use of dili'erentrolls pipes and tubes of all sizes from the smallest to theia rgcst can be rille d at any desired pitch.

The details of the machine may be widely varied; thus the rolls may be (lIlVCll by any st'l'ibcd.

2. in apparatus for rilhng pipes or tubes, a pair 01 stewed rolls formed with circumi'crential grooves or passes lor the pipes or tubes having circululcrcntially extending beads rilling or-ribs, and means for positively rotating both 'ol the rolls; substantially as described.

a. in apparatus for rilling pipes or tubes, a pair of rolls having each a groove or uss for the pipes or tubes with circuml'ercntially' pipe or tube and the rolls or ribs;substantially as dc-' extending beads rifiing or ribs, the two rolls having their aXes crossing each other and lneanslfor osltively driving the said rolls;

substantial y as described. 4. In apparatus for rithng pipes or tubes, 'a' pair oi rolls supported with their axes crossing each other, and having each a semielliptical groove or pass formed with a plurality-of -vrojecti'ng beads rilling or ribs; substantially as described.

5. In apparatus for rilling ipes or tubes, a rifling roll having semi-cl i tical groove or pass formed with a central-rib or head and with lateral ribs or heads, the lateralribs or beads being of than thecentral rib or head; as described.

(3. In apparatus for ritling pipes and tubes, a pair of rolls supported with their axes substantially erossing'each other --at the centers of the rolls, each of said rolls having a semi-elliptical groove or pass formed'with a central rib or-bead, and two lateral ribs or beads equally spaced from the central rib or head and of greater length or projection; substantially as described.

7. In apparatus for rilling pipes or tubes, a pair of rolls supported with their axes intersecting each other at the centers of the rolls','; and each having formed with a plurality of equally spaced circumferential beads or ribs 01 different diameters, and means for adjusting the rolls to vary their angular relation; substantially as described. v

8. in -apparatus for rilling pipes or tubes, a pair of rolls, supporting frames or hous ings therefor, yokes swiveled in. said frames or housings and carrying bearings for the rolls, and means for securing said yokes in different positions to vary the angular rela-. tions olthe rolls, said rolls having each a pass lOIIllGtl with a plurality of rilling beads or ribs, together with means'i'or positively rotating scribed.

5). 1n apparatus for skewed 'riiling pipes or tubes, rilling rolls, arranged to support the pipe or tube adjacent to their points of rilling contact] therewith, eil'ecting a relative rotary movement ol' the about the longitudinal axis of the pipe or tube; substantially as described.

j It). in apparatusl'or rilling pipes or tubes, 120

showed rolls arranged to l'orm rilling bends in the walls of the pipes or tubes, and having supporting walls for the pi ms or tubes adjacent. to their points of rilling contact therewith, I rotary rum-(uncut ol' the pipes or tubes and the rollsabout the longitudinal axis oitho former-J; substantially as described.

' II. in apparatus for rilling pipes ,or tubes, at skmv-roll formed greater length or projection 0 a groove or pass 95 the rolls; substantially deand means for and means for cilccting a relative ssseee ticel pass whose walls are formed with rifling beads or projections; substantially as described.

12. In apparetus for rifiing pipes or tubes, a pair of skew-rolls having oo1nplementery posses formed with circumfereninlly extending bending ribs or beads, the walls of said passes being arranged to sup- ;mrt the pipe or tube adjacent to the points m at contact of the bending ribs or beads thereof said grooves having trifling ribs or beads,

substantially as described. Y

14. In apparatus for riding pipes or tubes, a pair of skewed rolls having circumferentiel grooves which together form a closed pass for the; pipes or tubes, the walls of said grooves hevmg rifling ribs or beads, and also forming a support for the pi es .or tubes throughout a major portion 0 their circumference, substantially as described.

In testimony whereof, I have hereunto setmy hand.

' CHARLES FELL.

Witnesses: D. L. JENKINS, J. S. CRAIG. 

